You will need to lift the colour of your hair first and to be honest, they do not last long!
The best thing to do is to go to a salon that uses wella products and ask them to use Magma on your hair and tell them the colour that you would like.....they in turn will show you a chart and discuss the shade, depth, tone etc.
The colour you buy on/in a packet, bottle or box is never the colour it goes on due to the fact that the base colour is never the exact same!
Colour revolves around Depth, Tone and the Porosity of the hair!
Have fun!
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